Hair brush



FIG. 1 is a perspective view of a hair brush showing our new design;

FIG. 2 is an end elevational view thereof;

FIG. 3 is an end elevational view of a second embodiment of the hair brush, wherein the only difference resides in the fact that this embodiment has ten instead of twelve parallel rows of projections;

FIG. 4 is an end elevational view of a third embodiment of the hair brush, wherein the only difference resides in the fact that this embodiment has eight instead of twelve parallel rows of projections. 

The ornamental design for a hair brush, as shown and described. 